I can't think of any names off hand, guess some people like to reinvent themselves though, some of the old style of vocal phrasing & lyrics can sound dated in this time, perhaps some people just want to sound new, yeah if it works change can be good.

There's nobody else but Dillinger on the track I produced and no editing of the vocal either. For me the reason singers usually change with the passing of time is the same as why a sportsman at the end of their career aren't as good as when they were younger - just like a sportsmans muscles/energy/fitness levels etc deteriorate, so does a singers vocal chords. The way they can sing when they're 21 is hard to maintain when they're 53, with very few exceptions...